```html
<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Open Deep Research | 开源深度研究助手</title>
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    <script src="https://cdn.jsdelivr.net/npm/mermaid@latest/dist/mermaid.min.js"></script>
    <style>
        body {
            font-family: 'Noto Sans SC', Tahoma, Arial, Roboto, "Droid Sans", "Helvetica Neue", "Droid Sans Fallback", "Heiti SC", "Hiragino Sans GB", Simsun, sans-serif;
            background-color: #f8fafc;
            color: #1e293b;
            line-height: 1.6;
        }
        .hero-gradient {
            background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 50%, #a78bfa 100%);
        }
        .card-hover:hover {
            transform: translateY(-5px);
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
        }
        .feature-icon {
            width: 60px;
            height: 60px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 16px;
            margin-bottom: 1.5rem;
        }
        .drop-cap::first-letter {
            font-size: 3.5em;
            float: left;
            line-height: 0.8;
            margin-right: 0.2em;
            margin-top: 0.15em;
            color: #4f46e5;
            font-family: 'Noto Serif SC', serif;
        }
        .highlight-box {
            border-left: 4px solid #4f46e5;
            background-color: #f5f3ff;
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: -1.5rem;
            top: 0;
            height: 100%;
            width: 2px;
            background: #c7d2fe;
        }
        .timeline-dot {
            position: absolute;
            left: -2.1rem;
            top: 0.5rem;
            width: 1rem;
            height: 1rem;
            border-radius: 50%;
            background: #4f46e5;
        }
    </style>
</head>
<body class="antialiased">
    <!-- Hero Section -->
    <section class="hero-gradient text-white py-20 md:py-32 px-4">
        <div class="max-w-6xl mx-auto">
            <div class="flex flex-col md:flex-row items-center">
                <div class="md:w-1/2 mb-10 md:mb-0 md:pr-10">
                    <h1 class="text-4xl md:text-5xl font-bold mb-6 leading-tight">Open Deep Research</h1>
                    <h2 class="text-xl md:text-2xl font-medium mb-6 text-indigo-100">开源人工智能研究助手</h2>
                    <p class="text-lg mb-8 text-indigo-50">通过AI自动化深度研究，为研究人员、内容创作者和商业分析师生成综合报告</p>
                    <div class="flex flex-col sm:flex-row gap-4">
                        <a href="https://github.com/langchain-ai/open_deep_research" class="bg-white text-indigo-600 hover:bg-indigo-50 font-medium py-3 px-6 rounded-lg transition duration-300 flex items-center justify-center">
                            <i class="fab fa-github mr-2 text-xl"></i> GitHub 仓库
                        </a>
                        <a href="#quick-start" class="bg-indigo-700 hover:bg-indigo-600 text-white font-medium py-3 px-6 rounded-lg transition duration-300 flex items-center justify-center">
                            <i class="fas fa-rocket mr-2"></i> 快速上手
                        </a>
                    </div>
                </div>
                <div class="md:w-1/2">
                    <img src="https://cdn.nlark.com/yuque/0/2025/png/21449790/1755406371172-efa53a59-322c-4db8-b492-20a1a9260358.png" alt="Open Deep Research 界面展示" class="rounded-xl shadow-2xl border-4 border-white border-opacity-20">
                </div>
            </div>
        </div>
    </section>

    <!-- Problem Section -->
    <section class="py-16 px-4 bg-white">
        <div class="max-w-4xl mx-auto">
            <div class="text-center mb-16">
                <h2 class="text-3xl font-bold mb-4 text-gray-800">它能解决什么问题</h2>
                <div class="w-20 h-1 bg-indigo-500 mx-auto"></div>
            </div>
            
            <p class="drop-cap text-lg mb-8">研究任务通常具有开放性，难以预先确定最佳策略。用户在进行深度研究时，常常面临以下痛点：手动搜索信息耗时且效率低下；整合来自不同来源的信息需要大量整理工作；复杂问题可能需要多主题并行研究，单人难以高效处理。此外，用户提供的上下文可能不充分，导致研究方向偏离预期。</p>
            
            <div class="grid md:grid-cols-3 gap-8 mt-12">
                <div class="bg-white p-6 rounded-xl shadow-md hover:shadow-lg transition duration-300 card-hover">
                    <div class="feature-icon bg-indigo-100 text-indigo-600">
                        <i class="fas fa-clock text-2xl"></i>
                    </div>
                    <h3 class="text-xl font-bold mb-3 text-gray-800">节省时间</h3>
                    <p class="text-gray-600">自动化研究流程，减少80%的手动工作时间</p>
                </div>
                
                <div class="bg-white p-6 rounded-xl shadow-md hover:shadow-lg transition duration-300 card-hover">
                    <div class="feature-icon bg-purple-100 text-purple-600">
                        <i class="fas fa-brain text-2xl"></i>
                    </div>
                    <h3 class="text-xl font-bold mb-3 text-gray-800">智能整合</h3>
                    <p class="text-gray-600">自动整理多源信息，生成结构化报告</p>
                </div>
                
                <div class="bg-white p-6 rounded-xl shadow-md hover:shadow-lg transition duration-300 card-hover">
                    <div class="feature-icon bg-blue-100 text-blue-600">
                        <i class="fas fa-users text-2xl"></i>
                    </div>
                    <h3 class="text-xl font-bold mb-3 text-gray-800">多智能体协作</h3>
                    <p class="text-gray-600">并行处理多个子主题，提高研究效率</p>
                </div>
            </div>
        </div>
    </section>

    <!-- Core Features -->
    <section class="py-16 px-4 bg-gray-50">
        <div class="max-w-6xl mx-auto">
            <div class="text-center mb-16">
                <h2 class="text-3xl font-bold mb-4 text-gray-800">核心功能概述</h2>
                <p class="text-gray-600 max-w-2xl mx-auto">Open Deep Research 提供以下 4 个核心功能，助力高效研究</p>
                <div class="w-20 h-1 bg-indigo-500 mx-auto mt-4"></div>
            </div>
            
            <div class="grid md:grid-cols-2 gap-8">
                <div class="bg-white p-8 rounded-xl shadow-md">
                    <h3 class="text-xl font-bold mb-4 text-indigo-600 flex items-center">
                        <i class="fas fa-bullseye mr-3"></i> 研究范围界定
                    </h3>
                    <p class="text-gray-700">通过用户澄清和研究简报生成，确保研究方向明确，减少歧义。</p>
                </div>
                
                <div class="bg-white p-8 rounded-xl shadow-md">
                    <h3 class="text-xl font-bold mb-4 text-purple-600 flex items-center">
                        <i class="fas fa-robot mr-3"></i> 多智能体研究
                    </h3>
                    <p class="text-gray-700">利用主管-研究员架构并行处理子主题，快速收集高质量信息。</p>
                </div>
                
                <div class="bg-white p-8 rounded-xl shadow-md">
                    <h3 class="text-xl font-bold mb-4 text-blue-600 flex items-center">
                        <i class="fas fa-search mr-3"></i> 灵活搜索工具集成
                    </h3>
                    <p class="text-gray-700">支持 Tavily、Perplexity、ArXiv 等多种搜索 API，适应不同研究需求。</p>
                </div>
                
                <div class="bg-white p-8 rounded-xl shadow-md">
                    <h3 class="text-xl font-bold mb-4 text-green-600 flex items-center">
                        <i class="fas fa-file-alt mr-3"></i> 报告自动化生成
                    </h3>
                    <p class="text-gray-700">基于研究简报和收集的信息，生成结构化的 Markdown 格式报告，内容清晰且易于编辑。</p>
                </div>
            </div>
            
            <!-- Visual Diagram -->
            <div class="mt-16 bg-white p-6 rounded-xl shadow-md">
                <h3 class="text-2xl font-bold mb-6 text-center text-gray-800">Open Deep Research 工作流程</h3>
                <div class="mermaid">
                    graph TD
                        A[用户输入研究主题] --> B[研究范围界定]
                        B --> C[生成研究简报]
                        C --> D[多智能体研究]
                        D --> E1[智能体1: 子主题A]
                        D --> E2[智能体2: 子主题B]
                        D --> E3[智能体3: 子主题C]
                        E1 --> F[收集信息]
                        E2 --> F
                        E3 --> F
                        F --> G[信息整合与分析]
                        G --> H[生成Markdown报告]
                </div>
            </div>
        </div>
    </section>

    <!-- Use Cases -->
    <section class="py-16 px-4 bg-white">
        <div class="max-w-6xl mx-auto">
            <div class="text-center mb-16">
                <h2 class="text-3xl font-bold mb-4 text-gray-800">典型应用场景</h2>
                <p class="text-gray-600 max-w-2xl mx-auto">Open Deep Research 在多种场景中都能显著提升研究效率</p>
                <div class="w-20 h-1 bg-indigo-500 mx-auto mt-4"></div>
            </div>
            
            <div class="grid md:grid-cols-3 gap-8">
                <div class="relative pl-8 timeline-item">
                    <div class="timeline-dot"></div>
                    <div class="bg-gray-50 p-6 rounded-lg">
                        <div class="text-indigo-600 mb-3">
                            <i class="fas fa-graduation-cap text-2xl"></i>
                        </div>
                        <h3 class="text-xl font-bold mb-3 text-gray-800">学术研究支持</h3>
                        <p class="text-gray-600">研究生需要撰写关于 AI 安全性的综述论文。Open Deep Research 可通过 ArXiv 和 PubMed 搜索学术文献，生成包含引文的结构化报告初稿，节省手动整理时间。</p>
                    </div>
                </div>
                
                <div class="relative pl-8 timeline-item">
                    <div class="timeline-dot"></div>
                    <div class="bg-gray-50 p-6 rounded-lg">
                        <div class="text-purple-600 mb-3">
                            <i class="fas fa-chart-line text-2xl"></i>
                        </div>
                        <h3 class="text-xl font-bold mb-3 text-gray-800">商业竞争分析</h3>
                        <p class="text-gray-600">市场分析师需比较多个竞品的功能和定价。工具通过并行搜索各产品信息，快速生成对比报告，帮助团队制定策略。</p>
                    </div>
                </div>
                
                <div class="relative pl-8 timeline-item">
                    <div class="timeline-dot"></div>
                    <div class="bg-gray-50 p-6 rounded-lg">
                        <div class="text-blue-600 mb-3">
                            <i class="fas fa-landmark text-2xl"></i>
                        </div>
                        <h3 class="text-xl font-bold mb-3 text-gray-800">政策研究</h3>
                        <p class="text-gray-600">智库研究人员需验证某项政策的有效性。Open Deep Research 可通过多轮搜索和反思，挖掘高质量来源并生成详细报告，减少信息偏差。</p>
                    </div>
                </div>
            </div>
            
            <div class="mt-12 p-6 rounded-lg highlight-box">
                <h3 class="text-xl font-bold mb-4 flex items-center">
                    <i class="fas fa-lightbulb mr-3 text-indigo-600"></i> 思考提示
                </h3>
                <p class="text-gray-700">你的工作中是否需要快速整合多源信息？Open Deep Research 如何帮助你优化研究流程？</p>
            </div>
        </div>
    </section>

    <!-- Advantages -->
    <section class="py-16 px-4 bg-indigo-50">
        <div class="max-w-6xl mx-auto">
            <div class="text-center mb-16">
                <h2 class="text-3xl font-bold mb-4 text-gray-800">优势与特色</h2>
                <p class="text-gray-600 max-w-2xl mx-auto">与其他研究工具相比，Open Deep Research 具有以下独特优势</p>
                <div class="w-20 h-1 bg-indigo-500 mx-auto mt-4"></div>
            </div>
            
            <div class="grid md:grid-cols-2 gap-8">
                <div class="bg-white p-6 rounded-xl shadow-sm">
                    <h3 class="text-xl font-bold mb-4 text-indigo-600 flex items-center">
                        <i class="fas fa-project-diagram mr-3"></i> 双架构支持
                    </h3>
                    <p class="text-gray-700">提供基于图的工作流和多智能体架构，分别适合精细控制和高效率场景，用户可根据需求选择。</p>
                </div>
                
                <div class="bg-white p-6 rounded-xl shadow-sm">
                    <h3 class="text-xl font-bold mb-4 text-purple-600 flex items-center">
                        <i class="fas fa-sliders-h mr-3"></i> 高度可定制
                    </h3>
                    <p class="text-gray-700">支持多种语言模型（如 GPT、Claude）和搜索工具，用户可通过配置文件灵活调整研究深度和工具选择。</p>
                </div>
                
                <div class="bg-white p-6 rounded-xl shadow-sm">
                    <h3 class="text-xl font-bold mb-4 text-blue-600 flex items-center">
                        <i class="fab fa-github mr-3"></i> 开源免费
                    </h3>
                    <p class="text-gray-700">完全开源，社区可自由贡献，适合预算有限的团队或个人开发者。</p>
                </div>
                
                <div class="bg-white p-6 rounded-xl shadow-sm">
                    <h3 class="text-xl font-bold mb-4 text-green-600 flex items-center">
                        <i class="fas fa-shield-alt mr-3"></i> 上下文隔离
                    </h3>
                    <p class="text-gray-700">多智能体模式为每个子主题分配独立上下文，避免信息混淆，提高复杂研究任务的准确性。</p>
                </div>
            </div>
            
            <!-- Limitations -->
            <div class="mt-12 bg-white p-6 rounded-xl shadow-sm">
                <h3 class="text-xl font-bold mb-4 text-gray-800 flex items-center">
                    <i class="fas fa-exclamation-triangle mr-3 text-yellow-500"></i> 局限性
                </h3>
                <p class="text-gray-700">工具依赖外部 API（如 Tavily、OpenAI），可能产生额外费用。生成的报告质量受模型和搜索结果影响，若输入问题模糊或搜索 API 返回信息不完整，可能需要人工干预。此外，当前多智能体模式主要支持 Tavily 搜索，其他搜索工具需使用基于图的工作流。</p>
            </div>
        </div>
    </section>

    <!-- Quick Start -->
    <section id="quick-start" class="py-16 px-4 bg-white">
        <div class="max-w-4xl mx-auto">
            <div class="text-center mb-16">
                <h2 class="text-3xl font-bold mb-4 text-gray-800">上手指南</h2>
                <p class="text-gray-600">快速上手 Open Deep Research 的详细步骤，适合初学者</p>
                <div class="w-20 h-1 bg-indigo-500 mx-auto mt-4"></div>
            </div>
            
            <div class="space-y-8">
                <div class="flex items-start">
                    <div class="flex-shrink-0 bg-indigo-100 text-indigo-600 rounded-full w-10 h-10 flex items-center justify-center mr-4 mt-1">
                        <span class="font-bold">1</span>
                    </div>
                    <div>
                        <h3 class="text-xl font-bold mb-3 text-gray-800">检查环境</h3>
                        <p class="text-gray-700 mb-4">确保系统安装了 Python 3.11+ 和 uv 包管理器：</p>
                        <div class="bg-gray-800 text-gray-100 p-4 rounded-lg overflow-x-auto">
                            <code class="text-sm font-mono">
                                curl -LsSf https://astral.sh/uv/install.sh | sh<br>
                                python3 --version
                            </code>
                        </div>
                    </div>
                </div>
                
                <div class="flex items-start">
                    <div class="flex-shrink-0 bg-indigo-100 text-indigo-600 rounded-full w-10 h-10 flex items-center justify-center mr-4 mt-1">
                        <span class="font-bold">2</span>
                    </div>
                    <div>
                        <h3 class="text-xl font-bold mb-3 text-gray-800">克隆仓库</h3>
                        <p class="text-gray-700 mb-4">下载项目代码并进入目录：</p>
                        <div class="bg-gray-800 text-gray-100 p-4 rounded-lg overflow-x-auto">
                            <code class="text-sm font-mono">
                                git clone https://github.com/langchain-ai/open_deep_research.git<br>
                                cd open_deep_research
                            </code>
                        </div>
                    </div>
                </div>
                
                <div class="flex items-start">
                    <div class="flex-shrink-0 bg-indigo-100 text-indigo-600 rounded-full w-10 h-10 flex items-center justify-center mr-4 mt-1">
                        <span class="font-bold">3</span>
                    </div>
                    <div>
                        <h3 class="text-xl font-bold mb-3 text-gray-800">创建虚拟环境</h3>
                        <p class="text-gray-700 mb-4">隔离依赖以避免冲突：</p>
                        <div class="bg-gray-800 text-gray-100 p-4 rounded-lg overflow-x-auto">
                            <code class="text-sm font-mono">
                                uv venv<br>
                                source .venv/bin/activate  # Windows 用户：.venv\Scripts\activate
                            </code>
                        </div>
                    </div>
                </div>
                
                <div class="flex items-start">
                    <div class="flex-shrink-0 bg-indigo-100 text-indigo-600 rounded-full w-10 h-10 flex items-center justify-center mr-4 mt-1">
                        <span class="font-bold">4</span>
                    </div>
                    <div>
                        <h3 class="text-xl font-bold mb-3 text-gray-800">安装依赖</h3>
                        <p class="text-gray-700 mb-4">使用 uv 安装所需库：</p>
                        <div class="bg-gray-800 text-gray-100 p-4 rounded-lg overflow-x-auto">
                            <code class="text-sm font-mono">uv sync</code>
                        </div>
                    </div>
                </div>
                
                <div class="flex items-start">
                    <div class="flex-shrink-0 bg-indigo-100 text-indigo-600 rounded-full w-10 h-10 flex items-center justify-center mr-4 mt-1">
                        <span class="font-bold">5</span>
                    </div>
                    <div>
                        <h3 class="text-xl font-bold mb-3 text-gray-800">配置环境变量</h3>
                        <p class="text-gray-700 mb-4">复制示例文件并添加 API 密钥：</p>
                        <div class="bg-gray-800 text-gray-100 p-4 rounded-lg overflow-x-auto">
                            <code class="text-sm font-mono">
                                cp .env.example .env
                            </code>
                        </div>
                        <p class="text-gray-700 mt-2">编辑 <code class="bg-gray-200 px-1 rounded">.env</code> 文件，填入如 <code class="bg-gray-200 px-1 rounded">TAVILY_API_KEY</code>、<code class="bg-gray-200 px-1 rounded">OPENAI_API_KEY</code> 等密钥。</p>
                    </div>
                </div>
                
                <div class="flex items-start">
                    <div class="flex-shrink-0 bg-indigo-100 text-indigo-600 rounded-full w-10 h-10 flex items-center justify-center mr-4 mt-1">
                        <span class="font-bold">6</span>
                    </div>
                    <div>
                        <h3 class="text-xl font-bold mb-3 text-gray-800">启动 LangGraph 服务器</h3>
                        <p class="text-gray-700 mb-4">运行以下命令启动本地服务：</p>
                        <div class="bg-gray-800 text-gray-100 p-4 rounded-lg overflow-x-auto">
                            <code class="text-sm font-mono">
                                uvx --refresh --from "langgraph-cli[inmem]" --with-editable . --python 3.11 langgraph dev --allow-blocking
                            </code>
                        </div>
                        <p class="text-gray-700 mt-2">启动后，浏览器会打开 LangGraph Studio UI（默认地址：<a href="https://smith.langchain.com/studio/?baseUrl=http://127.0.0.1:2024" class="text-indigo-600 hover:underline" target="_blank">https://smith.langchain.com/studio/?baseUrl=http://127.0.0.1:2024</a>）。</p>
                    </div>
                </div>
                
                <div class="flex items-start">
                    <div class="flex-shrink-0 bg-indigo-100 text-indigo-600 rounded-full w-10 h-10 flex items-center justify-center mr-4 mt-1">
                        <span class="font-bold">7</span>
                    </div>
                    <div>
                        <h3 class="text-xl font-bold mb-3 text-gray-800">运行研究任务</h3>
                        <ul class="list-disc pl-5 text-gray-700 space-y-2">
                            <li>在 UI 的消息输入框中输入研究主题（如"AI 安全性研究"）。</li>
                            <li>选择多智能体或工作流模式，点击"提交"。</li>
                            <li>根据需要提供反馈或接受生成的报告计划，最终获取 Markdown 格式报告。</li>
                        </ul>
                    </div>
                </div>
            </div>
            
            <div class="mt-12 p-6 rounded-lg highlight-box">
                <h3 class="text-xl font-bold mb-4 flex items-center">
                    <i class="fas fa-lightbulb mr-3 text-indigo-600"></i> 思考提示
                </h3>
                <p class="text-gray-700">你是否有一个需要快速研究的主题？尝试用 Open Deep Research 生成一份报告，看看结果如何</p>
            </div>
        </div>
    </section>

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</body>
</html>
```